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DIGIAIR PRO
USER MANUAL
Content:
DIGIAIR PRO – Description
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1 GETTING STARTED
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1.1 POWER ON/OFF
1.2 POWER SUPPLY AND BATTERY
1.3 HOW TO USE THE METER
1.4 ATTENUATOR
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2 DESCRIPTION OF THE FUNCTIONS
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2.1 SINGLE CHANNEL MODE
2.2 DIGITAL-MODE
2.3 MULTI CHANNEL MODE
2.4 SPECTRUM MODE
3 MENU
3.1 BEEPER
3.2 ANTENNA VOLTAGE
3.3 SETUP
3.3.1. LCD
3.3.2. BEEPER VOLUME
3.3.3. CHANNEL RULES
3.3.4. SET CHANNEL LIST
3.3.5. CHANNEL GROUPS
3.3.6. AUTO POWER OFF
3.3.7. SIGNAL TYPE
3.4 ANALOG MODE
3.5 DIGITAL MODE
TECHNICAL SPECIFICATION
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DIGIAIR PRO - DESCRIPTION
Emitor´s DIGIAIR Pro is developed in Sweden for exact alignment and adjustment of
terrestrial antennas. This is made for both analogue (dBuV) and digital DVB-T –
COFDM.
DIGIAIR Pro is microprocessor controlled, making it very reliable and accurate.
Signal strength is presented on the LCD-display. In analogue mode it shows a
single channel or six channels at the same time. You can also choose to view the
signal in spectrum mode.
In digital mode it displays the BER (bit error rate) and SNR (signal/noice ratio).
Readout of UCB (uncorrected bits) and CB (corrected blocks) is also easy to do.
Furthermore DIGIAIR Pro present pitch tones (the higher tone the stronger signal)
on a loudspeaker.
DIGIAIR Pro is very sensitive and can detect even the weakest signals.
DIGIAIR Pro can feed Voltage (0/5/12/24 Volt) to external active antennas this
feature is short-circuit protected by an automatic fuse.
DIGIAIR Pro is charged via an external DC power-source of 10 -15 volt.
The DIGIAIR PRO operates with 8xAA rechargeable batteries. The unit will work for
at least 2 hours with fully charged batteries.
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1 Getting Started
1.1 Power ON/OFF
To turn the unit ON, simply push the Power ON/OFF button (the unit is battery
operated).
The unit starts in Single channel mode, showing the signal on the meter. To turn
the unit OFF, push and hold down the ON/OFF button.
1.2 Power supply and battery
DIGIAIR PRO can be fed by an external power-supply through the VDC port, by an
external power-source (10-18v DC, max 1A). This is useful in case that the battery
goes empty during an installation. Connect the power-source and hold down the
ON button for a couple of seconds (until the unit turns On).
To turn the unit OFF when the unit is fed by an external power-supply, simply
disconnect the power-source.
A discharged battery takes about 14 hours to recharge. The recharging is controlled
by the units microprocessor and is indicated on the display. Please notice that to
obtain full capacity of new batteries it is necessary to recharge and run down the
battery-pack a couple of times.
The meter has 8 x AA rechargeable NiMh batteries in the battery-compartment.
Apart from recharging the battery the unit does not need any particular
maintenance. The unit should be recharged when the battery is empty (indicated
with a battery-indicator symbol on the display in Single channel mode). It is
preferably done with one of the enclosed chargers (the power-supply or the carcharger).
A fully charged battery is operational for more than two hours (depending on the
external antenna load).
1.3 How to use the meter
Start by connecting the antenna and then turn the meter On.
The user interface works as a “revolver” where the meter starts in Single
channel- mode (and the latest channel selected), readout of the signal level in
dBuV.
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It is very easy to point an antenna towards a transmitter in this mode. The “maxhold
function” (small bar in the big bar) will make it very accurate.
1.4 Attenuator
If the incoming signal is very strong (the bar in the thermometer scale reaches
100%) it can easily be attenuated with a push on the OK button (about -20dB).
Press down the mode button again when the antenna is pointed in the right
direction.
This will put the meter in the Digital-mode.
Hopefully, but not always, the digital readout; BER (bit error rate) and SNR (signal
noice ratio) will correspond well with the analogue setting of the antenna.
Quite often the antenna needs to be re-directed a little bit in order to maximize the
digital-values (which are of more importance then the analogue readout).
The PRE-BER value (before correction in the demodulator) is the most useful signal
for aligning the antenna. The POST-BER value (after demodulator corrections)
increases in correspondence with the increasing of the PRE-BER value.
Pressing the Mode button again will take the meter to the Multichannel-mode
where the analogue (dB) signal strength of up to 30 channels can be easily readout.
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The display shows six channels on each page and there are five pages. Step
through the pages with the “UP” and “DOWN” buttons.
The Spectrum-mode is accessed with another push on the MODE button
Press OK for Zoom - in this mode the stepping will be 1 MHz.
The meter shows the frequency spectrum of 48-860 MHz. A marker can select a
certain channel (with the “UP”, “DOWN” buttons).
Signal level (in dBuV) of that channel will be shown in the display also.
Another push on the mode button will take the meter back to Single channel-mode
2. Description of functions
2.1 Single channel-mode (view one channel)
In this mode the meter measure analogue signal strength on the selected channel.
The higher dB value, the better signal. The maximum signal received is also
indicated. To change the channel, use the UP /DOWN buttons.
If the unit is feeding power to an antenna it is indicated with the 0V, 5V, 12V or 24V
symbol. This function can be selected in the Antenna voltage menu. The battery
indicator is not shown when the unit is fed by an external power-supply
2.2 Digital-mode (view digital)
PRE- and POST- BER (Bit Error Rate) and SNR (Signal/noice Ratio) is presented in
this mode.
The BER should be as low (less errors) as possible. The SNR should be as high as
possible (the signal coming out of the noice as much as possible).
In order not to be confusing both digital bars should be as high as they can be.
Signal-level shall increase from left to right.
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More, very useful, digital info can be readout when pushing the “OK” button in this
mode.
The following display will be shown on the LCD
CH = The selected channel (measured at) and frequency.
Demodulation type
Transmission:
Guard ratio:
Hi-priority code rate:
Low-priority code rate
16 QAM , 64 QAM or QPSK
2K or 8K
1/4, 1/8 , 1/16, 1/32
1/2, 2/3, 3/4, 5/6, 7/8
1/2, 2/3, 3/4, 5/6, 7/8
MER (Modulation Error Rate) Between 20 dB and >31dB
2.3 Multi channel-mode (view six channels)
In this mode the meter measure the signal strength of six individually selected
channels. DIGIAIR Pro can be set up with five such pages of six channels (5x6
channels). The page number is indicated in the top-right corner. To scroll through
the pages use the UP/DOWN buttons. To show/hide the channel numbers use the
OK button. The max-peak values are reset when changing page.
2.4 Spectrum-mode (view spectrum)
In this mode the meter shows all the channels between 45 MHz to 860 MHz.
One pixel-line represents one channel.
Move the cursor (the animated dotted line) with the UP and DOWN buttons and
place it over a “peak” (channel).
The signal-strength of the chosen channel is shown in the LCD (in dBuV).
3. Menu
The following menu is shown on the display when pressing down the MENU button:
This is the main menu. Use the “UP”/”DOWN” buttons to scroll up and down in the
menu system. Use the “OK” button to enable the selected function.
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3.1 Beeper
Choose Beeper On/Off in the main menu to turn the beeper (pitch tone) On or Off.
It is only audible in Single channel mode. The idea is to help finding the strongest
signal on the selected channel by listening to the highest pitch of the tone.
3.2 Antenna voltage
Choose Antenna voltage in the main menu and select 0V,5V,12V or 24V to be fed
to the ANTENNA port. The power to the antenna port is changed immediately when
the “OK” button is pushed even if you are in the main menu mode.
CAUTION! Do not connect the antenna to the antenna port before the correct
voltage is chosen. If the antenna should be fed with 5 Volt and You accidentally
choose 12 Volt instead, it may damage the antenna. The chosen Voltage output to
the antenna port is indicated on the LCD in Single channel mode.
The unit will turn off the antenna-voltage output if a short-circuit occur.
3.3 Setup
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3.3.1 LCD
- Contrast
Set the contrast of the LCD-display. Lighter or Darker
- Backlite
Set the backlite of the LCD-display On or Off.
3.3.2 Beeper volume
Set the volume of the Beeper with a value from 1 (low) to 5 (high).
3.3.3 Channel rules
In order to step the channels in a pre-selected way in single channel
mode and digital mode simply select the list in this setup which
corresponds with Your need.
3.3.4 Set Channel list
Chose the region/channel plan where the meter will be used.
3.3.5 Channel groups - Select channels
In this mode You can select the channels to be stored in DIGIAIR Pro´s
memory. The stored channels are shown in Multi channel mode.
Set up the five pages with the channels of Your choice. Do like this:
A) The top value in the first bar (most to the left) is flashing when
entering this setup. Step with the “UP”/”DOWN”-buttons to the
channel You want to change.
Press the “MODE”-button to open up the memory position.
- The channel nr will start to flash faster.
- Set the new channel with the “UP”/”DOWN”-buttons.
- Press the “MODE” button and the new channel is locked at this
position (memory saved).
- The channel nr will flash in normal pace.
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B) - Chose the next channel to change by highlighting it with the
“UP”/”DOWN” buttons.
- Press the “MODE”-button to open up the memory position.
- The channel nr will start to flash faster.
- Set the new channel with the “UP”/”DOWN”-buttons.
- Press the “MODE” button and the new channel is locked at this
position (memory saved).
- The channel nr will flash in normal pace.
C) - Repeat step B until all wanted channels have been
memorized.
- Press the “OK” button and the complete setting will be stored.
3.3.6 Auto power off
Set the meter for automatic switch Off after 1, 5, 10 or 30 minutes.
Or chose to have the meter always On (until manual switch Off).
3.3.7 Digital B/W
Select the Digital B/W to work with. Auto works with all, but it locks very
slowly.
3.3.8 Spec Mode
48-860 MHz shows whole spectrum.
Channels shows all channels.
3.3.9 Language
Select your menu language.
3.4 Analogue mode
All measurements will be in analogue mode. Digital measurements will not be
available. Single channel, 6 channels and spectrum will measure CW power.
3.5 Digital mode
All measurements will be in digital mode. Single channel, 6 channels and
spectrum will measure channel power.
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Technical specification:
Input frequency:
48-860 MHz.
Input level:
30-80 dBuV.
Attenuator:
On/Off (approx -20 dB).
Input impedance:
75 Ohm, F-connector.
Short circuit protection:
Automatic fuse on antenna-input.
Measuring method:
in digital:
Three bars showing:
- PRE-BER (Bit Error Rate before viterbi-correction).
- POST-BER (Bit Error Rate after viterbi-correction).
- SNR (Signal/noice ratio).
- MER (Modulation Error Rate).
- Constellation diagram
in analogue:
One bar showing dBuV in high resolution.
6 bars showing strength of 6 channels.
Spectrum display.
Pitch tone indication from beeper.
Signal-level readout:
Digital:
BER, MER and SNR values.
Analogue:
dBuV with maxhold-function.
Power out:
0V, 5V,12V and 24V.
Power supply/charger:
10 -15V DC (Centerpin+).
Display:
Back-lighted 128x64 Pixels LCD.
Power consumption:
500mA.
Battery:
8x AA rechargeable batteries of 1200mA each.
Weight:
0.3 kg.
Dimensions:
185 x 115 x 50 mm.
Accessories:
Power 12V DC, 1A
Rubber-case.
Car charger.
Emitor AB
Sjöviksbacken 14
117 43, Stockholm
Sweden
Phone: +46 8 775 00 01
Fax:
+46 8 775 00 06
Web: www.emitor.se
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